MiniMax-M2-BF16 (locally converted from FP8)

This repository contains a BF16-converted checkpoint from MiniMaxAI/MiniMax-M2.

Conversion

The conversion script is included in this repo:

• minimax_fp8_to_bf16.py

Method (high level):

1. Load FP8 tensors from safetensors shards.
2. Dequantize each FP8 tensor with its corresponding *_scale_inv tensor.
3. Save dequantized weights in BF16 format.
4. Remove *_scale_inv entries from model.safetensors.index.json.

Notes

• This is a conversion artifact for quantization workflow validation.
• Please review and follow the original license terms before redistribution or commercial use.
• Commercial products/services using this software or derivatives must prominently display MiniMax M2.1 in the UI, per the original license text below.

License

This repository follows the original MiniMax M2.1 license terms:

MIT License

Copyright 2025 MiniMax AI.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Our only modification is that, if the Software (or any derivative works thereof) is used for any of your commercial products or services, you shall prominently display "MiniMax M2.1" on the user interface of such product or service.